Table REF  presents results for our end-to-end question answering replication experiments on the NQ and TriviaQA datasets in terms of the exact match score.
The original results are shown in the “orig” column.
The “repl” column reports our attempt to replicate exactly the span scoring technique described in the original paper, whereas the “GAR” column shows results from using the technique proposed by [1]}.
The version of each technique that incorporates retriever scores (see Section REF ) is denoted with a * symbol, i.e., “repl*” and “GAR*”.
For NQ, we used Retriever\(_{\textrm {NQ}}\)  and Reader\(_{\textrm {NQ-Single}}\) ; for TriviaQA, we used Retriever\(_{\textrm {Multi}}\)  and Reader\(_{\textrm {TQA-Multi}}\) .
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